EN 50122-3-2010 en Railway applications - Fixed installations - Electrical safety earthing and the return circuit - Part 3 Mutual Interaction of a c and d c traction systems《轨道交通 固.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 50122-3:2010Incorporating February 2011 and March 2011 corrigendaRailway applications Fixed installations Electrical safety, earthing and the return circuitPart 3: Mutual I

2、nteraction of a.c. and d.c. traction systemsBS EN 50122-3:2010 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 50122-3:2010. The UK participation in its preparation was entrusted to TechnicalCommittee GEL/9/3, Railway Electrotechnical Applications - Fixed Equipm

3、ent.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 2011 ISBN 978 0 580 ICS 29.120.50; 29.280 Compliance w

4、ith a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 December 2010. Amendments issued since publicationDate Text affected74985 828 February 2011 Correction to font errors in P

5、DF31 March 2011 Correction Februarys Corrigendum EUROPEAN STANDARD EN 50122-3 NORME EUROPENNE EUROPISCHE NORM October 2010 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centr

6、e: Avenue Marnix 17, B - 1000 Brussels 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50122-3:2010 E ICS 29.120.50; 29.280 English version Railway applications - Fixed installations - Electrical safety, earthing and the retu

7、rn circuit - Part 3: Mutual Interaction of a.c. and d.c. traction systems Applications ferroviaires - Installations fixes - Scurit lectrique, mise la terre et circuit de retour - Partie 3: Interactions mutuelles entre systmes de traction en courant alternatif et en courant continu Bahnanwendungen -

8、Ortsfeste Anlagen - Elektrische Sicherheit, Erdung und Rckleitung - Teil 3: Gegenseitige Beeinflussung von Wechselstrom- und Gleichstrombahnsystemen This European Standard was approved by CENELEC on 2010-10-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipu

9、late the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standar

10、d exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national

11、 electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,

12、Sweden, Switzerland and the United Kingdom. EN 50122-3:2010 2 Foreword This European Standard was prepared by SC 9XC, Electric supply and earthing systems for public transport equipment and ancillary apparatus (Fixed installations), of Technical Committee CENELEC TC 9X, Electrical and electronic app

13、lications for railways. It was submitted to the formal vote and was approved by CENELEC as EN 50122-3 on 2010-10-01. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any

14、 or all such patent rights. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2011-10-01 latest date by which the national standards conflicting with the EN have to be withdrawn

15、 (dow) 2013-10-01 This draft European Standard has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association and covers essential requirements of EC Directives 96/48/EC (HSR), 2001/16/EC (CONRAIL) and 2008/57/EC (RAIL). See Annex ZZ. _ 3 EN 501

16、22-3:2010 Contents 1 Scope 52 Normative references 53 Terms and definitions . 64 Hazards and adverse effects 64.1 General . 64.2 Electrical safety of persons . 65 Types of mutual interaction to be considered . 65.1 General . 65.2 Galvanic coupling . 75.3 Non-galvanic coupling 76 Zone of mutual inter

17、action . 86.1 General . 86.2 A.C. . 86.3 D.C. . 87 Touch voltage limits for the combination of alternating and direct voltages . 97.1 General . 97.2 Touch voltage limits for long-term conditions . 97.3 A.C. system short-term conditions and d.c. system long-term conditions 107.4 A.C. system long-term

18、 conditions and d.c. system short-term conditions 117.5 A.C. system short-term conditions and d.c. system short-term conditions 127.6 Workshops and similar locations 128 Technical requirements and measures inside the zone of mutual interaction . 138.1 General . 138.2 Requirements if the a.c. railway

19、 and the d.c. railway have separate return circuits. 138.3 Requirements if the a.c. railway and the d.c. railway have common return circuits and use the same tracks 158.4 System separation sections and system separation stations . 16Annex A (informative) Zone of mutual interaction 17A.1 Introduction

20、 . 17A.2 A.C. system as source 17A.3 D.C. system as source 21Annex B (informative) Analysis of combined voltages 22Annex C (informative) Analysis and assessment of mutual interaction 27C.1 General . 27C.2 Analysis of mutual interaction . 27C.3 System configurations to be taken into consideration 27A

21、nnex ZZ (informative) Coverage of Essential Requirements of EC Directives 28Bibliography 29EN 50122-3:2010 4 Figures Figure 1 Maximum permissible combined effective touch voltages (excluding workshops and similar locations) for long-term conditions 10Figure 2 Maximum permissible combined effective t

22、ouch voltages under a.c. short-term conditions and d.c. long-term conditions 11Figure 3 Maximum permissible combined effective touch voltages under a.c. long-term conditions and d.c. short-term conditions. 12Figure 4 Maximum permissible combined effective touch voltages in workshops and similar loca

23、tions excluding short-term conditions 13Figure 5 Example of where a VLD shall be suitable for both alternating and direct voltage . 14Figure A.1 Overview of voltages coupled in as function of distance and soil resistivity I 18Figure A.2 Overview of voltages coupled in as function of distance and soi

24、l resistivity II . 19Figure A.3 Relation between length of parallelism and zone of mutual interaction caused by an a.c. railway . 20Figure B.1 Definition of combined peak voltage 23Figure B.2 Overview of permissible combined a.c. and d.c. voltages . 24Figure B.3 Overview of permissible voltages in c

25、ase of a duration 1,0 s both a.c. voltage and d.c. voltage . 25Figure B.4 Permissible voltages in case of a duration 0,1 s a.c. voltage and a duration 300 s d.c. voltage . 26 5 EN 50122-3:2010 1 Scope This European Standard specifies requirements for the protective provisions relating to electrical

26、safety in fixed installations, when it is reasonably likely that hazardous voltages or currents will arise for people or equipment, as a result of the mutual interaction of a.c. and d.c. electric traction systems. It also applies to all aspects of fixed installations that are necessary to ensure ele

27、ctrical safety during maintenance work within electric traction systems. The mutual interaction can be of any of the following kinds: parallel running of a.c. and d.c. electric traction systems; crossing of a.c. and d.c. electric traction systems; shared use of tracks, buildings or other structures;

28、 system separation sections between a.c. and d.c. electric traction systems. Scope is limited to basic frequency voltages and currents and their superposition. This European Standard does not cover radiated interferences. This European Standard applies to all new lines, extensions and to all major r

29、evisions to existing lines for the following electric traction systems: a) railways; b) guided mass transport systems such as: 1) tramways, 2) elevated and underground railways, 3) mountain railways, 4) trolleybus systems, and 5) magnetically levitated systems, which use a contact line system; c) ma

30、terial transportation systems. The standard does not apply to: d) mine traction systems in underground mines; e) cranes, transportable platforms and similar transportation equipment on rails, temporary structures (e.g. exhibition structures) in so far as these are not supplied directly or via transf

31、ormers from the contact line system and are not endangered by the traction power supply system for railways; f) suspended cable cars; g) funicular railways; h) procedures or rules for maintenance. NOTE The rules given in this European Standard can also be applied to mutual interaction with non-elect

32、rified tracks, if hazardous voltages or currents can arise from a.c. or d.c. electric traction systems. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the

33、latest edition of the referenced document (including any amendments) applies. EN 50122-1:2010, Railway applications Fixed installations Electrical safety, earthing and the return circuit Part 1: Protective provisions against electric shock EN 50122-2:2010, Railway applications Fixed installations El

34、ectrical safety, earthing and the return circuit Part 2: Provisions against the effects of stray currents caused by d.c. traction systems EN 50122-3:2010 6 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 50122-1:2010 apply. 4 Hazards and adverse effec

35、ts 4.1 General The different requirements specified in EN 50122-1 and EN 50122-2, concerning connections to the return circuit of the a.c. railway, and connections to the return circuit of the d.c. railway, shall be harmonized in order to avoid risks of hazardous voltages and stray currents. Such ha

36、zards and risks shall be considered from the start of the planning of any installation which includes both a.c. and d.c. railways. Suitable measures shall be specified for limiting the voltages to the levels given in this European Standard, while limiting the damaging effects of stray currents in ac

37、cordance with EN 50122-2. NOTE Additional adverse effects are possible, for example: thermal overload of conductors, screens and sheaths; thermal overload of transformers due to magnetic saturation of the cores; restriction of operation because of possible effects on the safety and correct functioni

38、ng of signalling systems; restriction of operation because of malfunction of the communication system. These effects should be considered in accordance with the appropriate standards. 4.2 Electrical safety of persons Where a.c. and d.c. voltages are present together the limits for touch voltage give

39、n in Clause 7 apply in addition to the limits given in EN 50122-1:2010, Clause 9. 5 Types of mutual interaction to be considered 5.1 General Coupling describes the physical process of transmission of energy from a source to a susceptible device. The following types of coupling shall be considered: a

40、) galvanic (conductive) coupling; b) non-galvanic coupling; 1) inductive coupling; 2) capacitive coupling. Galvanic coupling dominates at low frequencies, when circuit impedances are low. The effects of galvanic coupling are conductive voltages and currents. The effects of inductive coupling are ind

41、uced voltages and hence currents. These voltages and currents depend inter alia on the distances, length, inducing current conductor arrangement and frequency. The effects of capacitive coupling are influenced voltages into galvanically separated parts or conductors. The influenced voltages depend i

42、nter alia on the voltage of the influencing system and the distance. Currents resulting from capacitive coupling are also depending on the frequency. NOTE As far as the capacitive and inductive coupling are concerned, general experience is that only the influence of the a.c. railway to the d.c. rail

43、way is significant. 7 EN 50122-3:2010 5.2 Galvanic coupling 5.2.1 A.C. and d.c. return circuits not directly connected A mutual interaction between the return circuits is possible by currents through earth caused by the rail potential of both a.c. and d.c. railways, for example return currents flowi

44、ng through the return conductors, earthing installations of traction power supply substations and cable screens. In case a conductive parallel path to the return circuit exists in the influenced system, various effects are possible. In case a vehicle forms part of the parallel path, return current o

45、f the influencing railway system can flow through the propulsion system of the traction unit. The same effects are possible when the return current of the influencing system flows, for example, through the auto-transformer and substation transformer of an auto-transformer system or through booster t

46、ransformers or other devices. An electric shock with combined voltages can occur when parts of the return circuits or conductive parts which are connected to the return circuits by voltage limiting devices are located in the overhead contact line zone of the other railway system, see 8.2.2. 5.2.2 A.

47、C. and d.c. return circuits directly connected or common In addition to the effects described in 5.2.1 current exchange will be increased where a.c. and d.c. return circuits are directly connected or common. NOTE Direct connections can be railway level crossings, common tracks, system separation sec

48、tions, etc. Currents flowing between the a.c. railway and the d.c. railway can create mutual interaction between the return circuits. Both return circuits are at the same potential at the location of the connection. A short-circuit within the a.c. system can cause a peak voltage on conductive struct

49、ures connected to the return circuit of the d.c. railway. The same effects apply for conductive structures connected to it directly or via a voltage limiting device (VLD). The voltage across the voltage limiting device can trip the device without a fault on the d.c. side. The connection of the return circuit of the d.